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Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2023
Income Taxes [Line Items]  
Schedule of Effective Income Tax Rate Reconciliation
Reconciliations of income tax expense (benefit) for the periods ended September 30 are as follows.
(PPL)
Three MonthsNine Months
2023202220232022
Federal income tax on Income Before Income Taxes at statutory tax rate - 21%$60 $45 $167 $150 
Increase (decrease) due to:    
State income taxes, net of federal income tax benefit16 8 49 56 
Valuation allowance adjustments1 (1)6 9 
Income tax credits (a)(9)(1)(11)(3)
Amortization of investment tax credit including deferred taxes on basis adjustment(1)— (2)(7)
Depreciation and other items not normalized(2)— (9)(8)
Amortization of excess deferred federal and state income taxes (13)(7)(33)(47)
Federal and state income tax return adjustments3 — (2)(1)
State income tax rate change (b)1 (5)— (5)
Other2 2 5 3 
Total increase (decrease)(2)(4)3 (3)
Total income tax expense (benefit)$58 $41 $170 $147 

(a)    The three and nine month periods ended September 30, 2023 primarily include a deferred tax benefit from renewable tax credits that will be acquired at a discount.
(b)    The three and nine months ended September 30, 2022 include a deferred tax benefit of $5 million, due to the corporate net income tax rate reduction. See "Pennsylvania State Tax Reform" below for additional information.
PPL Electric Utilities Corp [Member]  
Income Taxes [Line Items]  
Schedule of Effective Income Tax Rate Reconciliation Reconciliations of income tax expense (benefit) for the periods ended September 30 are as follows.
(PPL Electric)  
Three MonthsNine Months
2023202220232022
Federal income tax on Income Before Income Taxes at statutory tax rate - 21%$38 $38 $107 $114 
Increase (decrease) due to:    
State income taxes, net of federal income tax benefit13 14 36 43 
Depreciation and other items not normalized(1)(1)(8)(7)
Amortization of excess deferred federal and state income taxes(4)(4)(8)(9)
State income tax rate change (a)— (9)(1)(9)
Other(3)(1)— (1)
Total increase (decrease)5 (1)19 17 
Total income tax expense (benefit) $43 $37 $126 $131 
(a)    The three and nine months ended September 30, 2022 include a deferred tax benefit of $9 million, due to the corporate net income tax rate reduction. See "Pennsylvania State Tax Reform" below for additional information.
Louisville Gas And Electric Co [Member]  
Income Taxes [Line Items]  
Schedule of Effective Income Tax Rate Reconciliation Reconciliations of income tax expense (benefit) for the periods ended September 30 are as follows.
(LG&E)  
 Three MonthsNine Months
 2023202220232022
Federal income tax on Income Before Income Taxes at statutory tax rate - 21%$21 $21 $56 $57 
Increase (decrease) due to:    
State income taxes, net of federal income tax benefit4 4 10 11 
Amortization of excess deferred federal and state income taxes(3)(3)(9)(17)
Other(1)(1)(2)(2)
Total increase (decrease)— — (1)(8)
Total income tax expense (benefit)$21 $21 $55 $49 
Kentucky Utilities Co [Member]  
Income Taxes [Line Items]  
Schedule of Effective Income Tax Rate Reconciliation Reconciliations of income tax expense (benefit) for the periods ended September 30 are as follows.
(KU)  
 Three MonthsNine Months
 2023202220232022
Federal income tax on Income Before Income Taxes at statutory tax rate - 21%$26 $25 $63 $70 
Increase (decrease) due to:    
State income taxes, net of federal income tax benefit5 5 12 13 
Amortization of excess deferred federal and state income taxes(5)(4)(13)(16)
Other(2)(2)(3)(4)
Total increase (decrease)(2)(1)(4)(7)
Total income tax expense (benefit)$24 $24 $59 $63